We obviously have a different version of the FCTM as mine simply states that the aircraft is category C (my manual is revision 4). The graphs I refer to are in the section on stall recovery which in my copy start on page 7.12 and give stall speed against weight for all variants of the 737 from 300 to 900.
Based on those and some interpretation of the scales which aren't that clear I got the figures I gave and hence the answer.
The FCTM has obviously been updated somewhat since mine was published so my apologies for misleading you.